Help! My lovely, happy, chubby baby has been kidnapped by aliens and replaced with a constant cryer. She crys when I don't feed her quick enough, she crys when I put her down, she wails when I dare to go out of sight, she screams if there's a loud noise. Is this teething? Separation anxiety? She has no teeth yet but is dribbling and eating everything in sight. She's waking at night (from being a 12 hour sleeper), nothing seems to work. Any advice? I'm worried I've done something to make her like this and it's awful to watch her face go all red and blotchy because she's so upset. It seems really extreme to me, but maybe that's what teething's like. Help anyone?